IDY10220 SECURITE High Seas Forecast for Western METAREA 10 12S TO 30S BETWEEN 90E AND 125E, AND 30S TO 50S BETWEEN 80E AND 129E Issued by the Australian Government Bureau of Meteorology For 24 hours commencing 1100 UTC 15 June 2026 Part 1 Warnings Refer to latest warnings for boundary of affected area and type of weather system. Melbourne Gale Warning 5. Part 2 Situation at 150600 UTC Cold front near 29S074E 41S085E 50S090E. Forecast cold front near 41S095E 50S108E at 161200UTC. Low [1] 1011hPa near 34S128E. Forecast low [1] 1009hPa near 37S131E at 161200UTC, just east of area. Forecast low [2] 1015hPa near 30S082E at 160300UTC, entering from the north, then low [2] 1015hPa near 32S084E at 161200UTC. Forecast trough near 43S074E 49S077E at 160300UTC, entering from the west, then 45S080E 50S087E at 161200UTC. Part 3 Forecast Refer to latest warnings for details of the area affected. South of line 34S080E 42S099E 50S113E, outside of warnings: Northwesterly quarter winds shifting westerly quarter west of cold front, then shifting northwesterly quarter within 180nm east of trough. Wind speeds 25/33 knots. Rough to very rough seas. Moderate to heavy swell. East of line 33S118E 40S118E 44S129E: Southeasterly quarter winds. Winds 20/30 knots. Rough to very rough seas. Moderate to heavy swell. WIthin 90nm west of line 35S085E 30S082E: Southeasterly quarter winds. Winds 20/30 knots. Rough to very rough seas. Moderate to heavy swell. Within 240nm of line 16S110E 20S094E: Southeasterly quarter winds 20/30 knots. Rough to very rough seas. Moderate swell. Remainder: Winds not exceeding 25 knots. Moderate to rough seas. Low to moderate swell, increasing to moderate to heavy east of line 24S111E 37S111E 50S123E. Rain areas, scattered showers and isolated thunderstorms mostly within 180nm of cold front, lows, and north of line 18S089E 13S118E. Isolated showers elsewhere. Visibility reducing below 2nm in precipitation. Please be aware Wind and wave forecasts are averages. Wind gusts can be 40 per cent stronger than the forecast, and stronger still in squalls and thunderstorms. Maximum waves can be twice the forecast height. WEATHER MELBOURNE The next routine forecast will be issued at 21:00 UTC Monday.